Brake mechanism



Feb. s, 1927. I 1,616,599

I I E. R. SCHROEDER BRAKE MECHANI SM Filed Jan. 5, 1926 6 1 I Hlllullim /'ORNY -'Patented Feb. 8, 1927.

UNITED STATES f 1,616,599 PATENT, OFFICE.

, ERNEST R. scHRoEDER, oF HAWTHORNE, NEWJERsEY, AssrGNoR To AjiERrcAN-OAR AND EOUNDRY COMPANY, OE NEw YORK, N. Y., A CORPORATION 'OE NEW JERSEY.

:BRAKE MEcHANIsM-` Application led January 5, 1926. Serialv No. 79,346.

v In the drawings: v

Figure 1 is a plan view of a pawl and rachet mechanism constructed in accordance with the invention; f Fig. 2 is a sectionalview along the line 2-2 of Fig. 1;'

Fig. 3 is a sectional view along the line 3--3 of' Fig. 2, Fig. 4 is a sectional view along the line 10 4-4 of Fig. 1 illustrating themounting of the ratchet wheel on the base plate, and

Fig. 5 is a view similar to Fig. 2 showing one of the parts tilted for removal or insertion, certain parts being partly broken away.

It is an object of the invention to provide a brake shaft with a pawl and ratchet mechanism having provision for securely holding the pawl and the ratchet in operatiye position by a single locking member.

It is alsoan object of the invention to provide a,`'p a`.wl,fandl ratchet brake mechanism with'means 'for locking the ratchet wheel on the base plate and means for preventing removal of the pawl from the base plate when the ratchet wheel is mounted in position. Y

Referring to the drawing, a pawl and ratchet mechanism for a brake lshaft is illustrated comprising a base plate 1 having a ratchet wheel 2 and a awl 3Jmounted thereon. The base plate 1 1s provided with a post 4 for pivotally supporting the pawl 3 and a raised collar 5 for supporting the ratchet wheel 2. A recess lis formed in the base plate at the collar 5 and holes 6 are provided for bolting the plate in positon;

The ratchet wheel 2, which is adapted to be keyed in any 'suitable manner to a brake shaft, is provided with a hub portion 7 having two lugs 8 extending radially therefrom, The tion 9 for, roughly fitting in the opening through the collar 5 in the base plate l.- 45.`The collar 5in the base plate has a groove or slot` 10 'therein as' shown in Figs. 1 and 3 of the drawing. Such groove or slot 10 is made wide enough for permitting one of the lugs 8 to pass therethrough into the recess 25 below the collar. When mounting the ratchet wheel in position one of the lugs 8 is placed lunder the collar 5 as shown in Fig. 5, and the other lug I8 is moved through the slot l() into 'a position below the collar.

hub 7 is provided with a reduced sec- I'A lockingv member 12 is provided for clos-i ing 'the s lot lO'when the ratchet wheel is mounted in position. The locking member 12 com rises a section 13, which is adapted to rougily fit the slot 10, and a portion 14 which is adapted to be riveted to the base plate. An opening 15 is provided in the ratchet wheel 2 for permitting the inserting' or removing of the locking member 12:

.for this purpose, the portion 13 of said member may be tilted upward and outward in order to pass the opening. After the locking member is inserted in position, the end thereof is riveted in the base plate as indicated in Fig. 2- of the drawing. In the above structure, it will be noted the ratchet wheel 2 is free to rotate on the base plate 1 and is held in position `by the lugs 8 which are located below the collar 5 and the section 13 of the locking 4member 12.

The post 4, which pivotally supports the payvl 3, comprises a cylindrical portion 17 and a reduced tapered portiony 18. Two

lugs 19 project from the tapered section 18 for forming a bayonet lock with the pawl 3. The pawl 3, which is adapted to engage the teeth on the ratchet wheel for holding a brake in any set position, is provided with a cup-shaped portion 20 adapted to roughly t over the tapered portion 18 of the post 4. The cup-shaped portion 2O is provided with an internal recess 22 for receiving the lugs 19 When the pawl is mounted in position. Two slots 23 are formed in the lower part of the cup-shaped portion of the pawl which rests on the cylindrical portion 17 of the post 4. The slots 23 permit the lugs 19 to pass therethrough when mounting the pawl in position.

The lugs 19 on the post 4 and the slots 23 in the pawl 3, which, form a bayonet connection between the pawl and the base plate, are so positioned with respect to eachother as to make it impossible to mount the pawl on the post when the ratchet wheel 2 is mounted in position. Thus it is necessary to mount the pawl in position prior to the mounting of the ratchet wheel. The bayonet lock above described insures against the pawl being dismounted without lirst dismounting the ratchet wheel.

Attention is called to the fact that the cup portion of the pawl completely covers the pivoted connection between the pawl 4and a a ratchet wheel mounted on said base plate,

a pawl for engaging said ratchet wheel. and a bayonet lock between said pawl and the base plate for preventing dismounting the pawl when the ratchet wheel is mounted on said late. y

2. n a brake mechanism, a base plate, a ratchet wheel mounted on said base plate, a pawl for engaging said ratchet wheel, a bayonet lock between said pawl and the base plate for preventin dismounting the pawl when the ratchet w eel is mounted on said plate, and a single locking member `for securing the ratchet wheel to the base plate.

3. In a brake mechanism, a base plate,

' a ratchet wheel mounted on said base plate,

a awl mounted on said base plate in operatlve relation to said ratchet wheel, a single detachable locking member for securing the ratchet wheel to the base plate, and means 4for preventing the removal of the awl when the ratchet is in position on the aseplate.

4. In a brake mechanism, a -base plate having a post thereon, a ratchet Iwheel mounted on said base plate, a pawl pivotally mounted on said post for engaging said ratchet wheel, and a lug and' slot connection i formed between the post and pawl 'for holda cup-shaped portion for rotat ing the pawl in position and for permitting removal of the pawlfrom the base plate only when the ratchet wheel is dismounted. 5. In 'a brake mechanism, a base plate having a post thereon, a ratchet wheel mounted on said base plate, a pawl having a ly supporting the pawl on and for covering said post,

and a bayonet lock between said post and the pawl for .preventing removal of the I.pawl

' from the weather.

mounted in position. y Y y 6. In a'brake mechanism, a -base plate having a post thereon, a ratchet wheel" ratchet wheel mounted on said baseplatey a pawl for lengaging said ratchet wheel, pivotal supporting means forgthe pawl on from the post when the ratchet-wheel is i the plate serving to prevent dismounting of the pawl when the ratchet wheel is in position, and a single locking member for securing the ratchet wheel tothe plate.

8. In a brake mechanism, a base plate, al

ratchet wheel mounted on said plate, a'pawl l mounted on said late, means for preventing.

dismounting of t e pawl when theyratchet wheel is mounted in position, and a locking member secured to the base platefor holding the ratchet wheel in position, said ratchet wheel having an opening formed therein for permitting insertion and removal :of the locking member therethrough.

9. In a brake mechanism,.a base plate,;a

ratchet wheel mounted on said plate, a pawl pivotally mounted on said plate for engaging the ratchet wheel, said pawl being shaped and the plate and protect such connection yto cover the pivotal connection `between it .10. In a brake mechanism, a base plate having a raised collar with `a slot therein, a ratchet wheel having a hub .ortion .with projecting lugs thereon, said ratc et wheel being mounted on the. plate with said lugs eX-.

In witness whereof I have hereunto set my hand. u

ERNEST R. .SCHROEDER.` 

